Between version 3.0.8 and 3.5.0 there appears to be a regression with plugins and linking, because with 3.5.0, the symbol tables contain reference to libimf, libsvml, libimf, and libintlc. If the Intel Compiler is actually installed, this will cause the linker to find the library, and failing with Intel IPP's ippInit() not being found.
./AutopanoGiga: symbol lookup error: <path>/Plugins/libKExternal_linux64.so: undefined symbol: ippInit
If for version 3.5.1 (or 3.5.0), ldd Plugins/libKExternal_linux64.so gives a list that contains
(with libimf, libsvml and libirng getting resolved to the actual Intel Compiler libraries, if installed; the libintlc appears a bit later), while 3.0.8, it is just the iomp5 (which does not cause problems):